| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology for reading a BCA formed by a stamper by performing tracking. <P>SOLUTION: The recording medium includes a donut-shaped BCA102, and a donut-shaped recording area 120 provided outside of the BCA 102. In the BCA 102, a plurality of aggregates formed of a plurality of grooves aligned in a radial direction are aligned in the radial direction, and a plurality of pits are disposed discretely in a portion other than the plurality of the aggregates. The lengths of the respective pits in the radial direction are shorter than those of the respective grooves in the radial direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
